CPA is good and you can make money from it if you take the right steps. There are many tutorials on it and you should not be focused on getting CPA wso only. Check the forum here and also the popular marketplaces like Clickbank. I would not say that there is a particular one that is good. Most of what you find on CPA talk about the same approaches to using CPA to make money online.

If you would not mind, I can also share some ideas with you and some free useful resources that I use for making money with CPA. You may find them useful but you may still carry out your research on other materials on the internet. Just send me a PM or mail at femit329123(at)gmail.com

Its a video which helps you to make money through CPA. It can make your more familiar with CPA.
How To Make Money Online : CPA Means Huge PROFITS!